nxos integration fix part 1 (#27069)

* Assorted Python 3 fixes

* Fix `testcase` definition in integration tests

* Fix nxos_acl_interface

* clean up nxapi after nxos_nxapi

test/integration/targets/nxos_nxapi/tasks/cli.yaml

@@ -13,3 +13,9 @@
   with_items: "{{ test_items }}"
   loop_control:
     loop_var: test_case_to_run
+
+- name: disable nxapi
+  nxos_config:
+    lines:
+      - no feature nxapi
+    provider: "{{ cli }}"